纤维增强复合材料胶接结构疲劳特性试验研究  

Experimental study on fatigue characteristics of adhesively bonded fiber reinforced composite structures

作　　者：郭霞[1,2] 迟海 贺俊智[1,2] 刘伟丽 高峡 GUO Xia;CHI Ha;HE Jun-zhi;LIU Wei-li;GAO Xia(Beijing Centre for Physical and Chemical Analysis Beijing 100089,China;Beijing Key Laboratory of Organic Materials Testing Technology&Quality Evaluation,Beijing 100089,China;Beijing Academy of Science and Technology Key Laboratory of Analysis and Testing Technology,Beijing 10089,China)

机构地区：[1]北京市理化分析测试中心,北京100089 [2]有机材料检测技术与质量评价北京市重点实验室,北京100089 [3]北京市科学技术研究院分析測试技术重点实验室,北京100089

出　　处：《实验力学》2019年第6期1077-1084,共8页Journal of Experimental Mechanics

基　　金：北京市科学技术研究院北科萌芽计划(BGS201901)

摘　　要：本文对复合材料胶接结构的拉-拉疲劳特性进行了试验研究,采用载荷一寿命曲线疲劳寿命预测方法拟合得到疲劳寿命预测模型,并对不同载荷水平所引起的疲劳次数、刚度衰减和失效模式进行了分析探讨。结果表明:各级疲劳载荷水平下复合材料胶接结构的失效模式均为复合材料被粘物首层与第二层之间的层间失效;载荷一寿命曲线拟合形成的疲劳寿命模型可以预测复合材料胶接结构的疲劳寿命;随着疲劳循环次数的增加,复合材料胶接结构刚度呈现非线性减小的趋势。In this paper,the tension-tension fatigue characteristics of adhesively bonded composite structures are studied experimentally.Using the load-life curve fatigue life prediction method,life prediction model was obtained by fitting,and the fatigue times,stiffness attenuation and failure modes caused by different maximum loads were analyzed and discussed.It is concluded from experimental results that the failure modes of adhesively bonded composite structures at all levels of fatigue load are interlaminar failure between the first and second layers of composite materials・The fatigue life model formed by load-life curve fitting can predict the fatigue life of adhesively bonded composite structures・As the number of fatigue cycles increases,the stiffness of adhesively bonded composite structures decreases nonlinearly.Above conclusion can provide guidance for fatigue failure analysis of adhesively bonded composite structures。

关 键 词：纤维增强复合材料胶接结构 疲劳特性 疲劳寿命预测 刚度分析 

分 类 号：TB33[一般工业技术—材料科学与工程]